OK You Guys-here goes............(some of you may have already seen a similar explanation)
I am very confident the Moco radio can run a 4 ohm load--for this example -8 ohms is "the lightest load" 4 ohms is the "heaviest load", and 6 ohms is in the middle. For reference Zero ohms is the heaviset possible "load" which is AKA a dead short.
Lets say the Moco radio is a 5 ton truck, and the normal day to day "load" you put in it is a 1 ton (8 ohm ) load. The truck really doesnt have to develop that much power, the engine runs cool and the truck works away almost if there is no load at all. For this part--the speaker is soooo "light" at 8 ohms, it doesnt play loud as the radio doesnt have to develop that much power---for 8 ohms, the "give" is performance, but high reliability.
To the other "extreme" in this anaolgy, lets say you put 5 tons (4 ohms) on that same 5 ton truck. The motor "has" to make more power cause its moving a much larger load. The engine runs hotter, the fuel effeciency goes down, but since the 5 ton truck is made for a 5 ton load--all is OK, and all is fairly reliable. In this case, the radio has to move the heaviest load its made for, so its making more power (watts), so it plays louder. This comes at the expense of a higher current draw from the electrical system, and the radio will heat up more--so high performance--sacrificing SOME reliability.
Then there is right in the middle--a 3 ton load (6 ohms). The motor makes very reliable power to move the heavier load, the fuel economy is fair and the truck can run all day, have lots of "passing power, and hill climbing power" at hand. This middle ground doesnt strain the electrical as much as the 5 ton (4 ohm) load, the radio stays cooler, but there are more watts available to make the speakers play louder--avery happy medium between performance and reliability.
If you think of the ohms as a load--it does get easy. For those who want to take it one step further--on a speaker, the ohms are non-linear---just like a horsepower curve, a 100hp motor is not 100 HP at all RPM's. The ohms that he speaker shows the amp (radio in this case) changes radically depending on the frequency it is playing.
In the case of HOGTUNES, the ohms "swing" as low as 4.5 ohms, and as high as 25 ohms, but I still rate them at 5.75 (aka 6.0) ohms To go one step further--as the speaker heats up, the load naturally gets higher (even easier for the radio to "move" so everything becomes even MORE reliable).
I hope the analagy isnt too wacko to understand, but it really should help people get beyond the mystery of OHMS.
PEZ
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Topic: Front Speaker replacements (Read 22800 times)